Circular motion question: Mass on a rod rotating in a vertical circle

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The discussion revolves around understanding the forces acting on a ball attached to a rod rotating in a vertical circle. Participants clarify that the force exerted by the rod on the ball needs to be represented in addition to the gravitational force. There is an emphasis on applying Newton's laws, specifically the relationship between force and acceleration. The direction of the acceleration of the mass is also questioned, highlighting its importance in analyzing the motion. Overall, the conversation aims to clarify the representation of forces in circular motion scenarios.
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Homework Statement
A mass is attached to the one end of a rod and made to rotate with constant speed in a vertical circle.
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Free Body Diagram
By looking at the following question, I have no idea why the direction of force exerted by rod on a ball is represented like that. can anyone help me to understand?
Screenshot 2024-10-24 at 6.44.05 PM.png
 
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yusungmagic said:
I have no idea why the direction of force exerted by rod on a ball is represented like that.
Like what? The only force I see represented is the weight of the ball. You are asked to add a representation of the force from the rod.
 
sorry for the confusion, you are supposed to draw a force exerted on the mass by the rod. not the "W"
 
yusungmagic said:
sorry for the confusion, you are supposed to draw a force exerted on the mass by the rod. not the "W"
Have faith in Newton's laws! In particular, ##\vec F = m \vec a##
 
yusungmagic said:
sorry for the confusion, you are supposed to draw a force exerted on the mass by the rod. not the "W"
What is the direction of the acceleration of the mass?
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
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